On 05/23/2014 12:35 PM, suravee.suthikulpanit@xxxxxxx wrote:
From: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
The current platform AHCI drier does not set the dma_mask correctly
for 64-bit DMA capable AHCI controller. This patch checks the AHCI
capability bit and set the dma_mask and coherent_dma_mask accordingly.
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
---
drivers/ata/libahci_platform.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 7cb3a85..85049ef 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -368,6 +368,15 @@ int ahci_platform_init_host(struct platform_device *pdev,
Hi Suravee,
Would it be better to do the following before ahci_reset_controller()?
/* initialize adapter */
rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
if (rc)
return rc;
Thanks,
David
ahci_init_controller(host);
ahci_print_info(host, "platform");
+ if (hpriv->cap & HOST_CAP_64) {
+ if (!dev->dma_mask)
+ dev->dma_mask = &dev->coherent_dma_mask;
+
+ rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+ if (rc)
+ return rc;
+ }
+
return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
&ahci_platform_sht);
}
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